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Low-temperature self-repairing conductive composite material and preparation method thereof

A conductive composite material, self-healing technology, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., to achieve the effect of simple and easy preparation process, overcoming strict alignment, and high motion activity

Inactive Publication Date: 2015-04-22
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a low-temperature self-healing conductive composite material and its preparation method, aiming to solve the problem of repairing conductive materials in a low-temperature environment

Method used

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  • Low-temperature self-repairing conductive composite material and preparation method thereof
  • Low-temperature self-repairing conductive composite material and preparation method thereof
  • Low-temperature self-repairing conductive composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] In this embodiment, a low-temperature self-healing conductive material is prepared according to the following steps.

[0023] (1) Anhydrous citric acid (3.842g, 0.02mol) and N,N,N',N'-tetramethyl-1,3-propanediamine (2.604g, 0.02mol) were added to 10mL methanol solvent , stirring vigorously at room temperature for 30 minutes, so that the protonation reaction of the small molecule polycarboxylic acid and the small molecule polyamine occurs;

[0024] (2) Put the product solution obtained in step (1) in a vacuum drying oven at 60° C. for 4 days to dry to remove methanol to obtain a dried supramolecular polymer;

[0025] (3) Mix carbon nanotubes and supramolecular polymers uniformly at a mass ratio of 1:19 to obtain the target low-temperature self-healing conductive composite material.

[0026] In order to characterize the self-healing performance of the self-healing conductive material obtained in this embodiment, the test is as follows:

[0027] The low-temperature DSC o...

Embodiment 2

[0036] In this example, the low-temperature self-healing conductive composite material was prepared by the same method as in Example 1, the only difference being that "3.842g anhydrous citric acid" in step (1) was replaced with "7.648g anhydrous citric acid".

[0037]The same self-repair performance test as in Example 1 can be obtained: the composite material obtained in this example can support and hang 50g of weight after low-temperature repair; After 30 minutes, the resistance is 3 kohm; the original resistance at low temperature is 3.6 kohm, after cutting off and repairing at low temperature for 4 hours, the resistance value then stabilizes at 10 kohm.

Embodiment 3

[0039] This example uses the same method as Example 1 to prepare low-temperature self-healing conductive composite materials, the only difference is that: "2.604g N,N,N',N'-tetramethyl-1,3 - Propylenediamine" was replaced by "5.208 g N,N,N',N'-tetramethyl-1,3-propanediamine".

[0040] After the same self-repair performance test as in Example 1, it can be obtained that the composite material obtained in this example can support and hang 50g of weight after low-temperature repair; , and its resistance is 2.8 kohm; the original resistance at low temperature is 3.2 kohm, after cutting off and repairing at low temperature for 4 hours, the resistance value then stabilizes at 9 kohm.

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Abstract

The invention discloses a low-temperature self-repairing conductive composite material and a preparation method thereof. The composite material is characterized by being prepared by physically blending carbon nanotubes and supramolecular polymer at a mass ratio of 1: 1-19, wherein the supramolecular polymer is obtained by carrying out protonation reaction on small-molecule polycarboxylic acid and small-molecule polyamine at a molar ratio of (0.2-5): 1. The composite material disclosed by the invention has the capacities of spontaneously repairing the self structure and conducting electrical energy at a temperature below 0 DEG C.

Description

technical field [0001] The invention relates to the technical field of low-temperature self-healing conductive materials, in particular to a supramolecular composite material with low-temperature structural self-healing properties and low-temperature conductive self-healing properties and a preparation method thereof. Background technique [0002] Conductive self-healing materials are a hot research topic in recent years. General self-healing conductive materials are composed of a conductive medium and a polymer matrix, and the restoration of electrical conductivity often depends on the self-healing ability of the polymer. Limited by the polymers used, most of these materials can only complete structural repair and restore their electrical conductivity at room temperature or even high temperature. Qingbin Pei's group [Qingbin Pei, et al, Adv. Mater. 2013, 25, 4186–4191] tried to attach silver nanowires to a polymer matrix capable of Diels-Alder reaction, using the self-heal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K7/14C08G69/26H01B1/24
CPCC08G69/26C08K7/24C08K2201/001H01B1/24C08L77/06
Inventor 杨文王小骥宋健郝文涛
Owner HEFEI UNIV OF TECH
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